better timing

skyfloogle · Nov 15, 2023 · 6599a15 · 6599a15
1 parent 8aca107
commit 6599a15
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/source/common/vb_sound.c b/source/common/vb_sound.c
@@ -43,8 +43,13 @@ void sound_thread() {
     int shutoff_divider = 0;
     int clk1_divider = 0;
     int envelope_divider = 0;
+    u64 lastTime = svcGetSystemTick();
     while (true) {
-        svcWaitSynchronization(nothingEvent, 960000);
+        u64 newTime = svcGetSystemTick();
+        s64 waitNanos = 960000 - 2000 * (newTime - lastTime) / CPU_TICKS_PER_USEC;
+        if (waitNanos > 0)
+            svcSleepThread(waitNanos / 2);
+        lastTime = newTime;
         // do clk0
         if (--shutoff_divider >= 0) continue;
         shutoff_divider += 4;